14-11. Line weights and values shall be carefully selected, first, to convey most clearly the information intended by the drawing and to have satisfactory reproducing value for photographic and printing processes; and, second, to give a drawing of neat appearance. On Plate No. 14-2 there are shown line weights and values which it is desirable to follow.

14-12. Use of colored inks or pencils on blue prints. When it is necessary to make notes or lines upon blue prints, the depth of color of the print must be noted and the color of ink or pencil selected accordingly. Red ink or pencil shall not, however, be used, such markings being particularly hard to read. Yellow, bright orange, pea green, or blue pencil may be used, and black, white, or yellow ink. Bleaching fluid made for the purpose may be used when white lines are desired.

14–13. Standard symbols, as illustrated herein on Plates Nos. 14-14 to 14-29, shall be used in all cases where they will add to clarity or convenience in the use of a drawing.

14-14. Lettering shall be free-hand and in general accordance with the standard titles illustrated hereinafter on Plates Nos. 14-3 to 14-7. While some latitude as to the character and slope of letters may be allowed in order to accommodate the practice and training of the draftsman, all lettering, without exception, must be plain, simple, free from adornments, and easily legible; in general, vertical lettering is preferred. A disproportionate amount of time and effort shall not be devoted to lettering.

14-15. The notes or statements on drawings shall refer only to the matters to which a drawing properly relates, namely, design, construction, and kind of materials; reference thereon should not be made to contractual relations, quality of materials or workmanship, methods and requirements of inspections and tests, responsibility for results, guarantees required, procedure for approval and acceptance, or other extraneous matters. Where necessary to make the drawing clear, notes as to erection methods may be shown. In case there are two or more drawings covering a given project or accompanying a contract, the notes on the several drawings must be carefully compared to avoid discrepancies.

14-16. Titles. Drawings shall be appropriately titled in accordance with the standards illustrated herein on Plates Nos. 14-3

to 14-7. The title shall indicate the name and location of the station, the general project as well as the specific features shown on the plan, the date and the approving signatures of the responsible officers, the identifying numbers of the sheet, the specification number, if any, the initials of the draftsmen concerned in the preparation of the drawing, and any other pertinent and important data. Titles for all types of drawings shall invariably be drawn in simple, free-hand letters of uniform style, in general accordance with the examples shown.

14–17. Record of revisions shall be maintained on each drawing just above the title, starting at the bottom, as indicated in the illustrations.

14-18. Reference to computation book. Each drawing shall bear a notation indicating the official serial number of every computation book used in the design of work covered by the drawing.

14-19. Safe live loads to be shown. Every floor plan of a building and every general plan of any shipway, pier, wharf, bridge, dock, crane runway, crane track, or similar structure, shall bear a conspicuous notation or simple diagram indicating the safe live load for which the structure is designed.

14-20. Numbering of drawings. All drawings shall bear a serial number for identification, and a sheet designating number if more than one sheet is used for the project; also the number of the corresponding specification, if any.

14-21. Every drawing shall bear the initials or names of all supervisors, designers, tracers, and checkers directly concerned in its preparation. In case the use of initials causes confusion as to the identity of persons, names may be substituted.

14-22. Signature of drawings. Every drawing shall be signed by the officer responsible under the law or Navy Regulations for the correctness of the information or the sufficiency of the design indicated thereon. Drawings prepared at the bureau, or submitted to it for approval, shall bear the signatures of the project manager responsible for the project as a whole, and also of any other project manager responsible for any specific feature. The chief of bureau indicates approval of the drawing by signature. A drawing is not to be considered as authenticated until so signed and approved.

14-23. Filing of drawings. The tracings of all drawings prepared at the bureau, and the tracings of drawings prepared elsewhere and made a part of any public works contract, shall be retained in the bureau's drawing files. All tracings should be filed flat and in dust-proof drawers. A definite scheme of classifying and filing drawings shall be maintained to meet the conditions at hand effectively, and should be scrupulously followed. At a number of yards the card-index system has been found most satisfactory for filing drawings. A responsible custodian of the files shall be designated, who shall keep a proper record of the receipt, issue, loan, and return of all drawings and tracings in his custody. Such custodial duty may, if desirable, be in addition to the employee's regular duty.

14-24. Issue of prints; conditions. Prints shall be made as required, and shall be issued only to Government officials and employees required to consult them, and to others upon due authorization; prints shall not be furnished individuals or corporations for private or professional use, but may be issued to prospective bidders on contract work, provided a deposit is made for their safe return. Application for issue of prints shall in doubtful cases be referred to the chief of bureau.

14-25. Authority for publication of drawings for the illustration of technical writings or lectures or other purpose must be obtained from the chief of bureau.

SECTION II. SURVEY MAPS AND OTHER RECORD DRAWINGS.

14-26. Record drawings required. In addition to drawings prepared at the bureau, there are required from all yards and stations certain other drawings for the bureau's record files. These include: (a) Annual report maps and prints of all other topographic maps.

(b) Reproductions of all subsurface maps.

(c) Prints of hydrographic maps.

(d) Drawings covering all new construction or alterations to existing structures, whether performed by contract or by day labor.

(c) Prints of all approved drawings submitted by contractors.

(f) Marked prints showing modifications, extensions, or omissions followed in actual construction for all projects performed by day labor or by contract, where original plans have been approved by the bureau.

(g) Floor plans of officers' quarters, whenever changes are made.

ANNUAL REPORT MAPS.

14-27. Topographic maps are required of all stations owned or leased for an extended time by the Navy. All topographic maps must be corrected at least once yearly, and the latest map of the yard or station shall be submitted with the annual report. This map is known as the "annual report map," and shall be prepared in accordance with the following instructions:

14-28. The annual report maps are of importance to the Navy, since they record the growth of the yard or station and form the basis of numerous studies, reports, and projects for future improvements. They are issued in reduced size and bound form to the fleet, the bureaus, and the various yards and stations for their information and use. Uniformity in the arrangement and appearance of the maps is required.

14-29. Secret information not to be shown. Care must be taken that no secret or confidential information, particularly as to fortifications, be shown on these maps. Each map should have conspicuously indicated thereon the following notation: "For official use only."

14-30. Standard of style for annual report maps. There may be obtained from the bureau a photolithograph of the annual report map which most nearly represents the standard required as to typography, general appearance, arrangement, and utility; or reference may be made to the book of maps of yards and stations, using the map of the Boston yard as typical.

14-31. Preparation of maps. It should be constantly borne in mind that the original map will be reduced to fit on a sheet 16 by 21 inches in size; hence all lettering, hatching, and notations in general should be openly spaced so that when reduction occurs all features may be plainly legible. The bureau directs that the same style of title, lettering, tabulation of buildings, and coordinate lines as found on the Boston yard map be used on all maps, unless provision is specifically made herein for modification.

14-32. The annual report map shall show the improvements to June 30 of the fiscal year elapsing. Projected improvements shall not be shown. Improvements under construction shall be shown in dotted lines. The map shall, in general, represent surface conditions. Underground construction shall not be shown unless

this is possible without introducing the slightest confusion or detracting from the clear representation of surface conditions. The maps shall show:

Boundary lines of property.
Fences and gates.

Water-front limits or shore line.
Landings.

M. h. w. shore line (or quay wall).

M. 1. w. shore line (or quay wall).

Use moderately heavy line.

Use moderately heavy dotted line.

Limits of dredged channels, where included on yard map.

Soundings, if feasible, or limiting depth for each berth or slip. (Give date of

soundings.)

Bulkhead and pier-head lines.

Buildings, sheds, and similar structures.

Bridges and trestles.

Wharves, piers, quay walls, and water-front construction in general.

Dry docks and marine railways.

Floating structures, if permanently moored in place.

Crane tracks.

Railroad tracks and track scales.

Fire hydrants and fire-alarm stations.

Yard lights.

Shipbuilding and launching ways, noting depth of water over end of ways.
Reservoirs, including any large underground reservoirs.

Tanks, including underground oil tanks.

Capstans.

Fixed cranes, derricks, and shear legs, noting capacity in long tons.

Underwater obstructions, if any.

Material storage areas, specially assigned.

Coal sheds and open storage.

Scrap bins.

Yard dump, if any.

Pavements and walks in outline, so far as feasible without interference with other data.

Contours, if feasible.

Elevations of ground at important points (in case contours are not given).

Bearings of center lines of dry docks and coping elevations.

Street names.

City street lines in immediate vicinity of navy yard, with names.

Radio towers; elevated structures in general.

Flagstaff.

Recreation fields, tennis courts, etc.

Parade grounds.

Magazines, including subsurface magazines.

All other useful topography and notations.

14-33. Orientation. The north should be toward the top of the map, as is customary in all map making; this orientation may be